Obviously found it more helpful to research myself. Nothing is "debunked" but instead (of course) highly debated.
It was also later found that when a matriarch died, the replacement befehl to next most dominant animal in wolf society.
That dominance predetermined by aggression in years leading up to the passing of a matriarch. Putting hierarchy very much, back into play.
But more to the current subject. A new discovery, thanks to modern technology and security cams being linked through internet, shows many dogs suffer from abandonment anxiety than previously thought.
From whining or other obvious anxiety related behavior, to just lying beside the door. And lying there for as many of 6 of the 8 or 9 hours that a typical owner is gone from the home.